Path: chuka.playstation.co.uk!news
From: "Craig Graham" <c_graham@hinge.mistral.co.uk>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: 3D Object Size
Date: 25 Mar 1998 08:59:47 GMT
Organization: PlayStation Net Yaroze (SCEE)
Lines: 58
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References: <6f9emu$f1o27@chuka.playstation.co.uk> <35186EC5.64A5@mx2.redestb.es>
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Xavi <xavit@mx2.redestb.es> wrote in article
<35186EC5.64A5@mx2.redestb.es>...
> Steve Dunn wrote:
> >     I have a simple cube object (simple
> > for you lot, still took me an hour!)
> > created in 3DS.  When I export to dxf,
> > the normals are all AAF (pointing the
> > wrong way), so I can only dab on the
> > texture on the 'inside' of the cube.  I
> > got around this by using the 'double
> > sided polygon' command line wotsit in
> > the dxf2rsd tool.  The real problem is
> > that all surfaces of the cube are made
> > up of 2 triangles.  Now when these are
> > displayed, I can see the 'gap' between
> > the two triangles on the textured face.
> 
> When you save a dxf file the normals swap. You must
> re-swap them with "-back" parameter. 
> 
> try: dxf2rsd -back -quad2 ... ...
> 

When converting a 3DS Max (which Steve is using) exported DXF, use the
command line:

	dxf2rsd -v -Y-Z -s -e 1 myfile.dxf

Explaination:

-v	verbose mode (so you can see what it's doing)
-Y-Z	this'lll sort out the normals for you
-s	set the gourard shading bits in all the poly's (saves doing it with a
text editor)
-e 1	3DS Max tends to put in a lot of 'almost' the same points - they'll
look like 
	the same point in RSDTOOL, but you'll get tearing when you display it
(esp. 
	with a texture), so setting the error distance to a fairly small number
will make all
	the 'almost' points to be exactly the same.

Another (better) fix for the tearing is to load the RSD into RsdAnim and
use the optimise vertices
function with a radius of 1 (it works better than dxf2rsd's error
distance). Then click the optimise
polygons button for good measure (you'll get a much better result doing it
with RsdAnim).

Craig.
NOTE: RsdAnim is a direct RSD format keyframe animator (MIMe generator)
I've been working on.
Steve has an early beta of it, so he can use it in this instance...